I'd like to know the purpose of MOS (maintenance override
switch). At site, these switches are installed in a
stanchion with the transmitter (connected to ESD). thank
Answers were Sorted based on User's Feedback
maintenance override function is used for bypassing shutdown
processing so that it is not executed by safety logic during
partial maintenance such as specific input.Creating bypass
logic using a dedicated override allows the (HIS) to safely
perform maintenance override for SCS (system control station)
However Maintenance override can not executed from the HIS
unless this switch is in the permission status.
|Is This Answer Correct ?||21 Yes||0 No|
Answer / seba
MOS is used for enabling /disabling (permision to bypasing
shutdown signal from ESD system.once it enabled you can
overide perticular loop or swtich or function block.
MOS is installed normally on DCS and activating by DCS
operator or concerned engineer for allowing maintenance
technician to perform calibration or replacement of faulty
switches and transmitters.
|Is This Answer Correct ?||19 Yes||2 No|
Answer / winter r
I want a example defeat of control sheet about when
something is verride .
|Is This Answer Correct ?||1 Yes||2 No|
How to calculate 47Liter H2 Gas cyilnder consumtion? Cylinder inlet Pressure is 200bar and Discharge pressure is 6.0bar. Flow is 100ml/min.For the above condition how many days one cylinder can be used?
what is surge and how is it prevented, what is the purpose of bypass valve across AS valve.
why does mA signal preferred for signal transmission?
WHAT IS SELF CLEAN ELCTRODE IN MAGNETIC FLOWMETER?? WHAT DO YOU MEAN BY THIS TERM??
What is the Flow rate ?
If hart communicator provide 4-20ma source to any transmitter during the callibration?
How much should be the values and/or percentages of these given below factors for a good controller ? Steady state error Delay Rise Time Overshoot Peak Time Settling Time Damping Oscillations & vibrations thanks
what is transducer?
what is mean by live zero and dead zero
HI, can anybody give details about GAS TREATMENT PLANT CONSTRUCTION,as INSTRUMENTATION ENGINEER what are the responsibilites.what are the instruments mainly instrumentation engineer will deal with
what is the difference between transmitter and converters?
What is the main difference between Cavitation and Flashing?